package com.jt.servlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class HelloServlet02 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        this.getInitParameter();       初始化参数
//        this.getServletConfig();        Servlet配置
//        this.getServletContext();        Servlet上下文
        ServletContext servletContext = this.getServletContext();
        String username = "小红"; //数据
        servletContext.setAttribute("username", username);  //数据保存在了Servletcontext
    }

}
